الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
The present investigation was carried out to study and
evaluate the status of Fe, Mn, Zn and Cu in some soils of Egypt:
a) Calcareous and alluvial soils. The different fractions of soil
extractable Fe, Mn, Zn and Cu were also determined using five
methods commonly in use to extract soil Fe, Mn, Zn and Cu. The
work also, included a green·house experiment using barley plants
were used as an indicator plant to evaluate the efficiency of each
of the different extracting agents of soil Fe, Mn, Zn and Cu as a
reliable parameter of their availability.
Simple correlations were calculated between the various
figures of Fe, Mn, zn and Cu extracted by the different extracting
solutions and the corresponding value of their uptake by barley
plant and hence to recommend the most efficient method to
determine Fe, Mn, Zn and CU availability in the soils under
consideration. The obtained results can briefly summarized as
follows: •
1- Chemical properties:
1.1. Total salinity and soluble salts:
The electrical conductivity (ECe) values varied from 0.55-
60.57 dS m”.
Soluble Ca is dominant in the calcareous soils in Bahig
(SiteS Nos. 7 and 8) and &Hammam (Sites Nos. 10, 11. 12,13
and ·14). while soluble sodi\I’n is the dominant in Tamia (Sites
No&. 18 and 19). Com-Oshin (Site No. 20). Soluble Mg is
dornNnt in Borg aArab (SiteS Nos. 3 and 4). In the other soil
sIes.. the order is Na ,.. Ca > Mel > It In the alluVial soils of Et.
Monofia Governorate , soluble Na is dominant in Ashmun (Site
No. 30) and Berket EI~Sabe(Site No. 32). In the Soils of the these
cations other soil sites, the order followed Mg orCa> Na > K.
The dominant soluble anions are CI and HC03 in the north
coast, while in the other soil sites, the dominant soluble anions are
CI and S04. In the alluvial soil of EI~Monofiathe dominant soluble
anions are CI and S04. HC03 occurs in small amounts.
1.2. Soli reaction (pH):
Soil reaction ranged from 7.2 to 8.27 in calcareous Soil and
from 7.~8.6 in the alluvial soils of EI~Monofia
2. Physical properties:
2.1. Mechanical analysis y:
Soil textured revealed that the calcareous soils are coarse
textured (sand or sand loam), while the alluvial soils are fine
textured (clay or clay loam).
2.2. Calcium carbonate content:
Calcium carbonate content ranged from 15.2 to 94.0% in
the calcareous soils. In the alluvial soil calcium carbonate content
ranged from 0.69 to 4.08%.
2.3. Organic matter content:
Organic matter content is relativelY low. it ranged between
0.4 to 0.77% in the calcareous soil. while in the alluvial soil it
ranged from 1.26 to 2.38%.
3. Status of some nutrient elements:
3.1. lotallron:
Total Wonranged from 0.14 to 9.58% in the calcareOUS soD.
while in the alluvial soil I ranged trom2.11 to 6.15%.
The correlation between soil properties and total Fe
indicated that total Fe correlated significantly and positively with
Silty, clay % and organic matter highly significant negatively
correlation between total Fe and CaC03 % and pH.
3.2. Total manganese:
Total Mn ranged from 15-8 to 749.0 ppm, in the calcareous
soils, while in the alluvial soil it ranged between 81.0 to 1160.0
ppm. The variations in total Mn content are due to variation in soil
texture organic matter content or both.
The correlation between some soil variables and total Mn
showed that:
total Mn correlated highly significant with Silt %, clay %
and organic matter % positively but it was a negatively highly and
significantly correlated with CaC03 content.
3.3. Total Zinc:.
Total Zn ranged from 8.33 to 90.0 ppm, in the calcareous
soils. In the alluvial soil it ranged from 64.0 to 260 ppm.
The variables and total Zn indicated :
That total Zn correlated positively and highly with Silt % •
clay % and organic matter %. caCa, had a negative and highly
significant correlation with Total Zn.
3.4. Total cooper:
Total Cu fluctuates between 1.6 to 75~Oppm, in the
. calc:lnOUS soil. And betWe80 8.0 to 136 PPM. In the aUuviaI soils.
The ~ betl!Jeen some soil properties and total Cu
shoWed that :
Total Cu correlated positively and highly significant with
Silt %, clay % and organic matter. On the other hand it correlated
negatively and highly significantly sand and CaC03 content.
4. Status of soil Fe, Mn, Zn and Cu:
The different soil contents of available Fe, Mn, Zn and Cu
were extracted using 5 methods,
1) OTPA
2) HCI
3) NH”OAc pH7
4) NH”OAc + 0.02% H.Q.
5) Distilled water
The results obtained for the soil extractable Fe, Mn, Zn and Cu
using the different methods can be presented as follows:
1- Fe, Mn, Zn and Cu extracted with DTPA ranged from 1.74-
13.0, 2.38-22.28,0.32-10.52 and 0.3-2.82 ppm, respectively in
the calcareous soils, while in the alluvial soils the values
ranged from 0.24 to 12.9.6.2-19.12.0.32-10.52 and 0.9-6.70
ppm.
2- Fe, Mo. zn. and Cu extracted with HCI ranged from 0.04-0.55,
0.1-10.65. 0.04-0.5 and 0.1-0.45 ppm. respectively in
calcareous soil. In the allwal soils the values ranged from
0.02-0.6. 10.8-38.9. 0.05-0.65 and 0.05-0.4 ppm.
3- Fe. Mo. zn and Cu extracted with NH40AC ra’ngedfrom 0.1-
1.5. 0.9-21.05. 0.2-10.1 and 0.1-0.6 ppm in the calcareous
sols. While in the aDuviaI soils ranged from 0.1-1.3. 1.9-18.9.
0.5-1.6 and 0.3-0.8 ppm.
4- Fe, Mn, Zn and Cu extracted with NH40Ac + H.Q ranged from
0.1-0.6, 0.6-63.1, 0.1-9.3 and 0.1-0.4 ppm in the calcareous
soils. While in the alluvial soil Fe, Mn, Zn and Cu ranged from
0.1-0.4,60.-84.0,0.1-0.9 and 0.1-Q.8ppm. respectively.
5- Fe. Mn, Zn and Cu extracted with NH20 ranged from 0.2-4.45,
0.1-0.5. 0.03-0.17 and 0.1-0.45 ppm in the calcareous soil. In
the alluvial soils, they ranged from 0.2-1.55. 0.05-0.25. 0.04-
0.75 and 0.1-0.5 ppm.
Dry matter yield:
The dry matter yield of barley plants grown on the alluvial
soils was vary mach higher than those obtained from the
calcareous soils.
Trace elements in plants:
1- iron
The highest Fe- uptake by barley plant was recorded by
plants for plants grown on alluvial soils, while the lowest Fe-uptake
was recorded by plants grown in the calcareous soils. A positively
high significant correlation between Fe-uptake and DTPAextractable
Fe was obtained .
2- Manganese:
The highest Mn uptake by barley plants was recorded for
plants grown on the alluvial soils, whIe the lowest was in plants
grown in the calcareous soils.
A highly significant end positive correlation was obtained
between Mn-upIake and each of DTPA. 0.1 N HCI and
NH.OAc+H.Q, but significant posIhe CDf1’8Iation with NHeOAc.
3- Zinc:
The highest values of Zn uptake were founded in the plants
grown on the alluvial soils, while the lowest were detected in case
of those the calcareous soils. A highly significant and positive
correlation was indicated between Zn-uptake and 0.1 N HCI
extractable Zn, it was insignificantly correlated with Zn
extractabled by the other methods.
4- Copper:
The highest Cu- uptake values were recorded for plants
grown on the alluvial soils, while the lowest Cu-uptake were found
in plants grown on calcareous soils Highly significant and positive
correlation was found between Cu-uptake and each of Cu
extractable by DTPA. NH.OAc and H20. while it was
insignificantly correlated with Cu extractabled by the other
methods.